Tyndall effect will be observed in :

A homogeneous solution looks absolutely dark when examined from a direction at right angles to the direction of the light beam, and it appears clear when observed in the direction of the light.

However, as a light beam travels through colloidal solutions, it is dispersed, with the greatest intensity of the scattered light occurring in a plane perpendicular to the light's path. The route beam is now apparent. Although Tyndall conducted extensive research on the phenomenon after it was initially noticed by Faraday, it is not generally recognised as the Tyndall effect.